Burton Freestyle Bindings black 2019/20 Re: Flex Technology - Re: Flex increases flex boards by 71% as opposed to traditional disc bindings, all in a package that is compatible with all major mounting systems including 4x4, the latest generation The Channel . The minimized base reduces weight by 20%, while the Living Hinge is a secret to increase flexibility and sensitivity. Baseplate Single Component Lightweight - one material on the entire base